package com.bdqn.springbootweb.filter;


import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

public class AuthorizationInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object handler) throws Exception {
        if (request.getSession().getAttribute("loginUser") == null) {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();
            out.print("<script>alert('请先进行登陆，再进行后续操作！(Interceptor 控 制)');location.href='" + request.getContextPath() + "/login.jsp';</script>");
            return false;
        } else {
            return true;
        }

    }

    public void postHandle(HttpServletRequest request, HttpServletResponse response,
                           Object handler, ModelAndView modelAndView) throws Exception {
    }

    public void afterCompletion(HttpServletRequest request, HttpServletResponse
            response, Object handler, Exception ex) throws Exception {
    }
}

